Ravi Shastri believes Rohit Sharma's challenges as captain of Mumbai Indians "have doubled" previously two years, resulting in poor returns as a staff.

"The resources that you had two or three years ago isn't quite the same. The challenges as a captain might have doubled for him. The work as a captain would have doubled as opposed to two years ago when everything was nice, set - go out there and do the job," Shastri stated about Rohit's captaincy on ESPNcricinfo's Ravi & Raunak programme.

"And then comes the challenge of how do you get them [the team] going, how do you motivate that bunch, how do you create a combination, how do you see who is the best in that lot to fit in and deliver at a certain stage of the game."

It's a interval during which they've misplaced gamers who fashioned their core within the glory years, there have been retirements, and accidents to key gamers.

There have been requires Rohit to take a step again.

Shastri agreed that not being in type with the bat has affected Rohit's captaincy as properly.

"If you start getting on a purple patch where you are scoring runs, the job as a captain becomes much easier, the body language on the field changes, that energy on the field is different as opposed to when you are not getting runs. You can go flat no matter who you are," Shastri stated. "That's where, as a captain, it is more important that your performances come into play. It is harder now because of the stage of his career, the kind of team that they have.

"The similar staff could possibly be a terrific staff in a 12 months's time or two years' time, as soon as they begin gelling collectively. But to get that correct mix, that is the job of the captain."